15 inch Spec-1 wheels are the sweet-spot small-diameter picks for lightweight builds, autocross setups, and clean daily drivers that want real sidewall. Three cast monoblock designs are stocked in this size: the SPT-33, the SPT-35, and the SPT-901, each built to slot onto common 4-lug and 5-lug imports. Every set ships free, with financing available through Affirm.
Shop 15" Spec-1 Wheels
Showing 15 in stock.
Why a 15-inch Spec-1 fits the build
Dropping to a 15-inch diameter frees up tall, cushioning sidewall for grip, ride comfort, and pothole survival — a favorite formula on classic Hondas, Miatas, and other small-chassis cars. These are one-piece cast monoblock wheels, so there are no seams or hardware to fuss over, just a straightforward mounting surface and a tidy face. The finishes carried here skew toward accented machined faces and lips rather than plain paint, which keeps a small wheel from looking flat under the fender. For a wider look at how this size fits the range, see the full Spec-1 lineup.
Which 15-inch models and finishes
The SPT-33 is the most flexible of the three, offered in this size in Gloss Black & Machined plus color-line treatments like Gloss Black & Blue Line and Gloss Black & Red Line, as well as Matte Bronze & Black Lip. A specific option to start with is the Spec-1 SPT-33 4x100 15x8 +20 Gloss Black & Machined.
The SPT-35 leans into a stepped-lip look with Gloss Black & Machined Lip and Gold & Machined Lip, such as the SPT-35 4x100 15x8 +25 Gloss Black & Machined Lip. The value-focused SPT-901 keeps it clean in Gloss Black & Machined — see the SPT-901 4x100 15x8 +20 Gloss Black & Machined. Prefer a single tone across the board? Browse black Spec-1 wheels, bronze, or brushed finishes.
Fitment coverage at 15 inches
All three 15-inch designs are built around a 15x8 width. The SPT-35 and SPT-901 are drilled 4x100, the classic pattern for older Civics, CRXs, early Miatas, and similar 4-lug imports. The SPT-33 opens up to both 4x100 and the wider 5-lug family, so it maps to the same platforms plus 5x100 and 5x114.3 cars. It also covers 5x105, 5x108, 5x110, and 5x112 fitments. Confirm your car's bolt pattern before ordering, since these three cover different lug counts.
How to choose your 15-inch set
Start with your bolt pattern: 4-lug cars can run any of the three, while 5-lug owners should focus on the SPT-33. Next, pick a look — a machined lip (SPT-35) reads more retro, a full machined face (SPT-901, SPT-33) reads more modern, and the SPT-33's color-line options add contrast. If you later want a larger diameter for the same styling family, the SPT-33 also appears in 16-inch is not offered but steps up through 17-inch, 18-inch, 19-inch, and 20-inch. Always verify offset and width clearance against your fenders and suspension.
Frequently Asked Questions
Which Spec-1 wheels come in 15 inch?
Three models are offered in 15-inch: the SPT-33, the SPT-35, and the SPT-901, all in a 15x8 width and cast monoblock construction.
What bolt patterns do the 15-inch Spec-1 wheels use?
The SPT-35 and SPT-901 are 4x100. The SPT-33 covers 4x100 plus 5x100, 5x105, 5x108, 5x110, 5x112, and 5x114.3.
What finishes are available on the 15-inch wheels?
Options include Gloss Black & Machined, Gloss Black & Machined Lip, Gold & Machined Lip, Gloss Black & Blue Line, Gloss Black & Red Line, and Matte Bronze & Black Lip, depending on the model.